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https://issues.apache.org/jira/browse/IMPALA-10222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17300688#comment-17300688
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ASF subversion and git services commented on IMPALA-10222:
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Commit 6c6b0ee869a766ba816e82c2fc821e499b2041c2 in impala's branch
refs/heads/master from Zoltan Borok-Nagy
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=6c6b0ee ]
IMPALA-10222: CREATE TABLE AS SELECT for Iceberg tables
This patch adds support for CREATE TABLE AS SELECT statements
for Iceberg tables.
CTAS statements work like the following in Impala:
1. Analysis of the whole CTAS statement
2. Divide CTAS to CREATE stmt and INSERT stmt
3. Create temporary in-memory target table from the CREATE stmt
4. Analyse the INSERT statement by using the temporary target table
5. If everything is OK so far, create the target table
6. Execute the INSERT query
For Iceberg tables the non-trivial thing was to create the temporary
target table without actually creating it via Iceberg API. I've created
a new class 'IcebergCtasTarget' that mimics an FeIceberg table. It can be
used with catalog V1 and V2 as well.
Testing
* e2e CTAS tests in iceberg-ctas.test
* SHOW CREATE TABLE stmts in show-create-table.test
Change-Id: I81d2084e401b9fa74d5ad161b51fd3e2aa3fcc67
Reviewed-on: http://gerrit.cloudera.org:8080/17130
Reviewed-by: Impala Public Jenkins <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Implement CREATE TABLE AS SELECT for Iceberg tables
> ---------------------------------------------------
>
> Key: IMPALA-10222
> URL: https://issues.apache.org/jira/browse/IMPALA-10222
> Project: IMPALA
> Issue Type: Sub-task
> Components: Frontend
> Reporter: Zoltán Borók-Nagy
> Assignee: Zoltán Borók-Nagy
> Priority: Major
> Labels: impala-iceberg
>
> Add support for CTAS statements for Iceberg tables.
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